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Section 2 : Units, Scientific Notation, and SI Prefixes

Section 2 : Units, Scientific Notation, and SI Prefixes. Quantities – Types of measurements. 7 SI Base Units Length (m) Mass(not weight ) (kg) Temperature (K) Time (s) Mole (mol) Luminosity ( cd –candela) Electricity (amp – ampere). Derived Units Volume (m 3 ) Speed (m/s)

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Section 2 : Units, Scientific Notation, and SI Prefixes

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  1. Section 2: Units, Scientific Notation, and SI Prefixes

  2. Quantities – Types of measurements 7 SI Base Units Length (m) Mass(not weight) (kg) Temperature (K) Time (s) Mole (mol) Luminosity (cd –candela) Electricity (amp – ampere) Derived Units Volume (m3) Speed (m/s) Flow Rate (kg/s) Area (m2) Force (N) Acceleration (m/s2) Momentum (kgm/s) Magnetic Flux (T/m2) And many many more!!!

  3. Scientific Notation: Used to express very large or very small numbers. Example: 2 x 104m How scientific notation is derived for larger numbers: 10 x 10 = 10 x 10 x 10 = 10 x 10 x 10 x 10 = 2 x 10 x 10 x 10 x 10 =

  4. Easy way for BIG numbers: • 2,000,000 = • 3900 = • 20.5 = • 49000000000 =

  5. How scientific notation is derived for small numbers:Ex) 3 x 10-4m 1/10 = 1/ 100 = 1/ 1000 = 3/1000 =

  6. Easy way for SMALL numbers • .000345 • .009 • .000000007832 • .00000000000000000000002973

  7. SI Prefixes: Used to express Very large and Very small numbersExamples: 1000km 30mg55 cm7.8 ns

  8. Zinc oxide balls used in solar panels used to scatter and trap light:15nm across

  9. NASA's Hubble Space Telescope reveals the center of the magnificent barred spiral galaxy NGC 1512 in all wavelengths from ultraviolet to infrared. The colors (which indicate differences in light intensity) map where newly born star clusters exist in both 'dusty' and 'clean' regions of the galaxy. 1 YM across

  10. (Optional)Write the following without SI Prefixes • 2km • 3 nm • 5320 ms • 2800 am • 40 Mg • 45 cm

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